John "Ace" Merrill is the main antagonist of the novella The Body from Different Seasons (and, consequently the novella's film version, Stand By Me), as well as a secondary antagonist in the novel Needful Things. Ace lived most of his life in Castle Rock, Maine (except in Stand By Me, in which Castle Rock is located in Oregon).
Ace is the nephew of Reginald 'Pop' Merrill. He leads a teenage gang of bullies who torment and terrorize Gordie LaChance, Chris Chambers, Teddy Duchamp and Vern Tessio. His closest friends among his gang are Norman "Fuzzy' Bracowicz and Richard "Eyeball" Chambers, Chris's older brother. He once had a girlfriend named Betsy Malenfant.
After being caught by Sheriff Alan Pangborn in the early-to-mid-80s for breaking and entering, Ace was sent to Shawshank Penitentiary for 4 years. After being released, Ace eventually made his way back to Castle Rock. He died there in 1991.
- "We're gonna get you for this."
- "You're dead."
- "What are you gonna do, shoot us all?"
- "This is big time, baby."